| Cactaceae | |
Gymnocactus aguirreanus
| Glass & R.A. Foster | Cact. Succ. J. (Los Angeles) 44(2): 80 | 1972 |
| Cactaceae | |
Gymnocactus beguinii
| (F.A.C. Weber ex K. Schum.) Backeb. | Cact & Succ Journ. Amer XXIII 151: | 1951 |
| Cactaceae | |
Gymnocactus conothele
| (Regel & Klein bis) Backeb. | Cactaceae Handb. Kakteen. 5: 2859 | 1961 |
| Cactaceae | |
Gymnocactus gielsdorfianus
| (Werderm.) Backeb. | Cactaceae (Berlin) 1942(1): 23 | 1942 |
| Cactaceae | |
Gymnocactus goldii
| (Bravo) Y. Itô | Cactaceae 475 | 1981 |
| Cactaceae | |
Gymnocactus horripilus
| (Lem.) Backeb. | Cact. Succ. J. (Los Angeles) 23: 151 | 1951 |
| Cactaceae | |
Gymnocactus knuthianus
| (Boed.) Backeb. | | 1961 |
| Cactaceae | |
Gymnocactus mandragora
| (Frič ex A. Berger) Backeb. | Cactaceae Handb. Kakteen. 5: 2862 | 1961 |
| Cactaceae | |
Gymnocactus ourselianum
| Y. Itô | Explan. Diagr. Austroechinocactinae 178 | 1957 |
| Cactaceae | |
Gymnocactus roseanus
| (Boed.) Glass & R.A. Foster | Cact. Succ. J. (Los Angeles) 42: 234 | 1970 |
| Cactaceae | |
Gymnocactus roseiflorus
| G. Frank | Succulentes (France) 72(1): 42 | 1993 |
| Cactaceae | |
Gymnocactus saueri
| (Boed.) Backeb. | Cactaceae (Berlin) 1941(2): 59 | 1942 |
| Cactaceae | |
Gymnocactus subterraneus
| (Backeb.) Fritz Schwarz | Cact. Succ. J. Gr. Brit. 11: 16 | 1949 |
| Cactaceae | |
Gymnocactus valdezianus
| (H. Moeller) Backeb. | | ** |
| Cactaceae | |
Gymnocactus viereckii
| (Werderm.) Backeb. | Cact. Succ. J. (Los Angeles) 23: 151 | 1951 |
| Cactaceae | |
Gymnocactus ysabelae
| (Schlange) Backeb. | | 1961 |